[TimBSmith]

Only one item baffles me. I don't have this on my engine.

I cannot see the tube you have in question.

I have an oil fill cap on the back of the engine and the dipstick tube on the front of the engine. Those are the only methods I have of draining or filling the oil.

I pump warm oil out (with device in prior post), measure what I have sucked up, then add new oil.

Please take picture(s) that show the top and both sides of of your engine.

Keep at it....